[Bug libstdc++/54075] [4.7.1] unordered_map 3x slower than 4.6.2

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54075

--- Comment #10 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-07-25 
09:56:15 UTC ---
A patch is available here:

  http://gcc.gnu.org/ml/libstdc++/2012-07/msg00051.html

Submitter and interested people can give it a try before it goes in.